免费单利计算器

快速计算单利金额,输入本金、利率和时间即可获得利息和总金额。

USD
%
years

总利息

$1,500.00

总价值$11,500.00

Total Interest vs Time Period

单利计算器帮助您快速计算基于本金、利率和时间的利息金额。单利是最基本的利息计算方式,利息仅根据原始本金计算,不会对已产生的利息再计息。它常用于短期贷款、国债和某些定期存款的利息计算。

公式

单利通过以下公式计算:I = P × r × t。该公式简单直观——将本金乘以年利率再乘以时间(年),即可得到利息总额。加上本金即为到期时的本息合计。

  • I = 利息总额
  • P = 本金(初始投入或借款金额)
  • r = 年利率(以小数表示,如5%写作0.05)
  • t = 时间(以年为单位)

分步解答

  1. 01输入本金金额(P),即初始存入或借入的金额。
  2. 02输入年利率(r),系统会将百分比转换为小数进行计算。
  3. 03输入时间期限(t),以年为单位(如6个月输入0.5年)。
  4. 04公式将三者相乘得到利息总额(I = P × r × t)。
  5. 05本息合计 = 本金 + 利息(P + I)。

计算示例

假设您将10,000元存入一个年利率为4.5%的单利定期账户,存期为3年。

  1. 01本金 P = 10,000 元
  2. 02年利率 r = 4.5% = 0.045
  3. 03时间 t = 3 年
  4. 04代入公式:I = 10,000 × 0.045 × 3 = 1,350 元
  5. 05本息合计 = 10,000 + 1,350 = 11,350 元

单利计算简单明了,适用于短期金融产品。但对于长期投资或贷款,复利才是实际的计算方式——已获得的利息会在后续期间继续产生利息。理解单利与复利的区别有助于您更准确地评估不同金融产品的实际收益或成本。

常见问题

What is simple interest?

Simple interest is calculated only on the original principal, not on accumulated interest. The formula is I = P * r * t, where P is principal, r is the annual rate, and t is time in years.

What is the difference between simple and compound interest?

Simple interest is calculated only on the principal. Compound interest is calculated on the principal plus accumulated interest, resulting in faster growth over time.

When is simple interest used?

Simple interest is commonly used for short-term loans, auto loans, and some personal loans. It is also used to calculate interest on savings bonds and US Treasury bills. Most mortgages and long-term investments use compound interest.

Is simple interest better for borrowers or lenders?

Simple interest is better for borrowers because you only pay interest on the original loan balance, not on accumulated interest. For lenders or investors, compound interest is more advantageous since returns grow faster.

学习

How to Calculate Mortgage Payments

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